<!--SIF Implementation Specification 2.2-6 (March 17, 2008)-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" targetNamespace="http://www.sifinfo.org/infrastructure/2.x" xmlns:sif="http://www.sifinfo.org/infrastructure/2.x" elementFormDefault="qualified">
  <xs:import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="imports/xml/xml.xsd" />
  <xs:complexType name="PurchasingType">
    <xs:sequence>
      <xs:element name="FormType">
        <xs:simpleType>
          <xs:restriction base="xs:token">
            <xs:enumeration value="PO" />
            <xs:enumeration value="REQ" />
          </xs:restriction>
        </xs:simpleType>
      </xs:element>
      <xs:element name="FormNumber" type="xs:normalizedString" />
      <xs:element name="FiscalYearRefId" minOccurs="0" nillable="true" type="sif:IdRefType" />
      <xs:element name="VendorInfoRefId" minOccurs="0" nillable="true" type="sif:IdRefType" />
      <xs:element name="LocationInfoRefId" minOccurs="0" nillable="true" type="sif:IdRefType" />
      <xs:element name="EmployeePersonalRefId" minOccurs="0" nillable="true" type="sif:IdRefType" />
      <xs:element name="PurchasingItems">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="PurchasingItem" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="ItemNumber" minOccurs="0" nillable="true" type="xs:normalizedString" />
                  <xs:element name="ItemDescription" type="xs:string" />
                  <xs:element name="Quantity" minOccurs="0" nillable="true" type="xs:normalizedString" />
                  <xs:element name="UnitCost" minOccurs="0" nillable="true" type="sif:MonetaryAmountType" />
                  <xs:element name="ExpenseAccounts" minOccurs="0" nillable="true">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="ExpenseAccount" minOccurs="0" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="AccountCode" type="xs:token" />
                              <xs:element name="Amount" type="sif:MonetaryAmountType" />
                            </xs:sequence>
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_Metadata" minOccurs="0" nillable="true" type="sif:SIF_MetadataType" />
      <xs:element name="SIF_ExtendedElements" minOccurs="0" nillable="true" type="sif:SIF_ExtendedElementsType" />
    </xs:sequence>
    <xs:attribute name="RefId" use="required" type="sif:RefIdType" />
  </xs:complexType>

  <xs:element name="Purchasing" type="sif:PurchasingType" />

</xs:schema>